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https://www.readbyqxmd.com/read/29759826/framework-design-and-pontics-of-fiber-reinforced-composite-fixed-dental-prostheses-an-overview
#1
REVIEW
Leila Perea-Lowery, Pekka K Vallittu
PURPOSE: Fiber-reinforced composite (FRC) fixed dental prostheses (FDPs) have shown good performance in clinical applications due to their good mechanical properties and minimally invasive approach. However, typical failure patterns of FRC FDPs are often localized at the pontic site. That reflects the structural considerations at the framework and pontic location that need to be examined when creating these kinds of prostheses. STUDY SELECTION: Peer-reviewed articles and other scientific literature were reviewed for providing up-to-date information on how pontics of FRC FDPs can be made...
May 11, 2018: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29744210/a-strain-gauge-analysis-comparing-4-unit-veneered-zirconium-dioxide-implant-borne-fixed-dental-prosthesis-on-engaging-and-non-engaging-abutments-before-and-after-torque-application
#2
Alyssa Epprecht, Marco Zeltner, Goran Benic, Mutlu Özcan
This study quantified the strain development after inserting implant-borne fixed dental prosthesis (FDP) to various implant-abutment joints. Two bone-level implants (∅ = 4.1 mm, RC, SLA 10 mm, Ti, Straumann) were inserted in polyurethane models (N = 3) in the area of tooth nos 44 and 47. Four-unit veneered zirconium dioxide FDPs (n = 2) were fabricated, one of which was fixed on engaging (E; RC Variobase, ∅ = 4.5 mm, H = 3.5 mm) and the other on non-engaging (NE) abutments (RC Variobase, ∅ = 4...
February 2018: Clinical and Experimental Dental Research
https://www.readbyqxmd.com/read/29724558/marginal-and-internal-fit-of-pre-sintered-co-cr-and-zirconia-3-unit-fixed-dental-prostheses-as-measured-using-microcomputed-tomography
#3
Elie E Daou, Hani Ounsi, Mutlu Özcan, Nadin Al-Haj Husain, Ziad Salameh
STATEMENT OF PROBLEM: Limited information is available on the precision of new metal processing technologies. PURPOSE: The purpose of this in vitro study was to evaluate the marginal and internal fit of pre-sintered cobalt-chromium (Co-Cr) and zirconia 3-unit fixed dental prostheses using x-ray microcomputed tomography. MATERIAL AND METHODS: Three-unit fixed dental prostheses were prepared on metal dies (N=12) using a typodont model from the maxillary first premolar to the first molar...
April 30, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29723313/a-five-year-retrospective-assay-of-implant-treatments-and-complications-in-private-practice-restorative-treatment-profiles-of-long-span-implant-supported-fixed-and-removable-dental-prostheses
#4
Vahed Parzham, Roy B Judge, Denise Bailey
PURPOSE: To describe the restorative treatment profiles of long-span (> three units), implant-supported dental prostheses (LIDPs) prescribed in 27 private practices in the state of Victoria, Australia, during the period from January 1, 2005, to December 31, 2009. The restorative treatment profiles of these prostheses refer to the framework/veneering materials, number of prosthetic units/supporting implants, location in the oral cavity, retention methods, and cantilever designs. LIDPs refer to implant-supported prostheses of fixed or removable design; namely, fixed partial dentures (IFPDs), fixed complete dentures (IFCDs), removable partial dentures (IRPDs), and complete overdentures (IODs)...
May 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29690230/a-survey-of-the-weevils-of-ukraine-coleoptera-curculionoidea
#5
Nikolai Yunakov, Vitalij Nazarenko, Rostislav Filimonov, Semyon Volovnik
The fauna of weevils Curculionoidea of Ukraine numbers 1453 species equivalent to 25.3% of European fauna. They belong to 10 families and 364 genera. A total of 51 species are recorded from Ukraine for the first time. Assessment of inventory completeness indicates that 62% of the area of Ukraine are covered by samples. Spatial join analysis has reveals strong collecting biases and shows maximal richness in cells which fall into well-sampled provinces. A total of 22 out of 33 studied model sites are well-sampled (C>0...
April 5, 2018: Zootaxa
https://www.readbyqxmd.com/read/29688894/fixed-retainers-with-bonded-pontics
#6
S Fayyaz Ahamed, A Fahima, A S Apros Kanna, A M Abubacker Siddique
No abstract text is available yet for this article.
March 2018: Journal of Clinical Orthodontics: JCO
https://www.readbyqxmd.com/read/29678585/fracture-load-of-metal-ceramic-monolithic-and-bi-layered-zirconia-based-posterior-fixed-dental-prostheses-after-thermo-mechanical-cycling
#7
Carlos López-Suárez, Raquel Castillo-Oyagüe, Verónica Rodríguez-Alonso, Christopher D Lynch, María-Jesús Suárez-García
OBJECTIVES: This study aims to evaluate the fracture load of differently fabricated 3-unit posterior fixed dental prostheses (FDPs) with an intermediate pontic. METHODS: Fifty sets of two stainless-steel abutments were randomly assigned to five groups (n = 10 each) depending on the material and technique used for manufacturing the FDPs: (1) Metal-ceramic (MC, control); (2) Lava Zirconia (LZ, bi-layered); (3) Lava Plus (LM, monolithic); (4) VITA In-Ceram YZ (YZ, bi-layered); and (5) IPS e-max ZirCAD (ZZ, bi-layered)...
April 17, 2018: Journal of Dentistry
https://www.readbyqxmd.com/read/29670720/clinical-and-radiographic-assessment-of-reasons-for-replacement-of-metal-ceramic-fixed-dental-prostheses-in-patients-referring-to-dental-school
#8
Roa'a Al Refai, Samah Saker
Background: The expected length of service and reasons for fixed dental prostheses (FDPs) replacement are a frequent inquiry by patients while the answers were mainly based on studies reports that was conducted outside the middle east region. This clinical and radiographic survey was constructed to assess and survey clinically and radiographically the reasons of replacement of metal-ceramic fixed dental prostheses, amongst patients reporting at dental school in Taibah University. Material and Methods: Between January and May 2016, 151 patients were recruited for this study...
January 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29660169/longevity-of-anterior-resin-bonded-bridges-survival-rates-of-two-tooth-preparation-designs
#9
Menaka Abuzar, John Locke, Gordon Burt, Gerard Clausen, Karen Escobar
BACKGROUND: Significant developments have occurred in the design of resin bonded bridges (RBBs) over the past two decades. They are commonly used as an alternative treatment option for a single missing tooth. The longevity of these bridges needs to be further investigated to evaluate long term outcomes for this option to remain relevant. METHODS: A cohort of patients who received anterior resin bonded bridges (ARBBs) over two decades was studied retrospectively...
April 16, 2018: Australian Dental Journal
https://www.readbyqxmd.com/read/29643532/-three-year-clinical-effects-of-a-modified-semi-fixed-bridge-on-restoring-a-missing-posterior-tooth
#10
J Tan, X X Wei, Q H Zhang, Y S Zhou
OBJECTIVE: To observe the effects of a modified semi-fixed bridge to restore a missing posterior tooth for three years. METHODS: In the study, 38 cases with a posterior tooth missed were chosen as experiment group. The inclusion criteria for these cases required that one abutment tooth be defected, and another abutment intact. The missed posterior tooth was restored with a modified semi-fixed bridge in which a metal wing retainer was applied to the intact abutment tooth and a full crown retainer was applied to the defected abutment tooth, and the non-rigid connector linked to the metal wing retainer and the pontic, while the rigid connector linked to the full crown retainer and the pontic...
April 18, 2018: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29531053/four-millennia-of-iberian-biomolecular-prehistory-illustrate-the-impact-of-prehistoric-migrations-at-the-far-end-of-eurasia
#11
Cristina Valdiosera, Torsten Günther, Juan Carlos Vera-Rodríguez, Irene Ureña, Eneko Iriarte, Ricardo Rodríguez-Varela, Luciana G Simões, Rafael M Martínez-Sánchez, Emma M Svensson, Helena Malmström, Laura Rodríguez, José-María Bermúdez de Castro, Eudald Carbonell, Alfonso Alday, José Antonio Hernández Vera, Anders Götherström, José-Miguel Carretero, Juan Luis Arsuaga, Colin I Smith, Mattias Jakobsson
Population genomic studies of ancient human remains have shown how modern-day European population structure has been shaped by a number of prehistoric migrations. The Neolithization of Europe has been associated with large-scale migrations from Anatolia, which was followed by migrations of herders from the Pontic steppe at the onset of the Bronze Age. Southwestern Europe was one of the last parts of the continent reached by these migrations, and modern-day populations from this region show intriguing similarities to the initial Neolithic migrants...
March 27, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29526302/effect-of-number-of-pontics-and-impression-technique-on-the-accuracy-of-four-unit-monolithic-zirconia-fixed-dental-prostheses
#12
Woong Ki Kim, Sunjai Kim
STATEMENT OF PROBLEM: Because of their relatively small scanning area, intraoral scanners may result in less accurate fixed dental prostheses (FDPs) than do laboratory scanners. PURPOSE: The purpose of this in vitro study was to evaluate the accuracy of monolithic zirconia FDPs with different numbers of pontics fabricated with different impression techniques. MATERIAL AND METHODS: The mandibular right premolars and molars of an acrylic resin model were prepared to receive 4-unit FDPs...
March 8, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29493018/surgery-without-papilla-incision-tunneling-flap-procedures-in-plastic-periodontal-and-implant-surgery
#13
REVIEW
Otto Zuhr, Stephan F Rebele, Stefani L Cheung, Markus B Hürzeler
Diverse clinical advancements, together with some relevant technical innovations, have led to an increase in popularity of tunneling flap procedures in plastic periodontal and implant surgery in the recent past. This trend is further promoted by the fact that these techniques have lately been introduced to a considerably expanded range of indications. While originally described for the treatment of gingival recession-type defects, tunneling flap procedures may now be applied successfully in a variety of clinical situations in which augmentation of the soft tissues is indicated in the esthetic zone...
June 2018: Periodontology 2000
https://www.readbyqxmd.com/read/29484714/implant-placement-in-the-esthetic-area-criteria-for-positioning-single-and-multiple-implants
#14
REVIEW
Tiziano Testori, Tommaso Weinstein, Fabio Scutellà, Hom-Lay Wang, Giovanni Zucchelli
Patient expectations from implant treatment have changed over the years and esthetics plays an important role in defining what is now called success of rehabilitation. Of the many factors that influence the outcome of the rehabilitation, the two main ones are the bone and soft-tissue deficiencies at the intended implant site. Many surgical approaches are described in terms of timing of implant placement and management of regenerative procedures. The aim of this article is to discuss the different implant placement alternatives in the esthetic area, in particular: (i) the timing of implant placement/regenerative procedures/skeletal growth/altered passive eruption; (ii) the correct three-dimensional position of the fixture between the cuspids and in the premolar area; (iii) multiple missing teeth in the esthetic area with single tooth/pontic or cantilevered options/prosthetic compensation; (iv) placement of implants into infected sites; and (v) the influence of abutment and crown morphology on implant position...
June 2018: Periodontology 2000
https://www.readbyqxmd.com/read/29395474/fatigue-resistance-of-all-ceramic-fixed-partial-dentures-fatigue-tests-and-finite-element-analysis
#15
S D Heintze, D Monreal, M Reinhardt, A Eser, A Peschke, J Reinshagen, V Rousson
OBJECTIVE: To estimate the fatigue resistance of a new translucent zirconia material in comparison to lithium disilicate for 3-unit fixed partial dentures (FPDs). METHODS: Eighteen 3-unit FPDs (replacement of first upper molar) with a connector size of 4mm×4mm were dry milled with a five-axis milling machine (Zenotec Select, Wieland, Germany) using discs made of a new translucent zirconia material (IPS e.max ZirCAD MT, Ivoclar Vivadent). Another 9 FPDs with a reduced connector size (3mm×4mm) were milled...
March 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29279766/evaluation-of-marginal-and-internal-gap-of-three-unit-metal-framework-according-to-subtractive-manufacturing-and-additive-manufacturing-of-cad-cam-systems
#16
Dong-Yeon Kim, Eo-Bin Kim, Hae-Young Kim, Ji-Hwan Kim, Woong-Chul Kim
PURPOSE: To evaluate the fit of a three-unit metal framework of fixed dental prostheses made by subtractive and additive manufacturing. MATERIALS AND METHODS: One master model of metal was fabricated. Twenty silicone impressions were made on the master die, working die of 10 poured with Type 4 stone, and working die of 10 made of scannable stone. Ten three-unit wax frameworks were fabricated by wax-up from Type IV working die. Stereolithography files of 10 three-unit frameworks were obtained using a model scanner and three-dimensional design software on a scannable working die...
December 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29258696/residual-stress-of-porcelain-fused-to-zirconia-3-unit-fixed-dental-prostheses-measured-by-nanoindentation
#17
Vinicius P Fardin, Estevam A Bonfante, Paulo G Coelho, Malvin N Janal, Nick Tovar, Lukasz Witek, Dimorvan Bordin, Gerson Bonfante
OBJECTIVE: To evaluate the residual stress (nanoindentation based on hardness) of fatigued porcelain-fused to zirconia 3-unit fixed dental prostheses (FDP) with different framework designs. METHODS: Twenty maxillary 3-unit FDP replacing second-premolar (pontic) were fabricated with conventional framework-design (even-thickness of 0.5mm and 9mm2 connector area) and modified framework-design (thickness of 0.5mm presenting lingual collar connected to proximal struts and 12mm2 connector area)...
February 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29196948/fracture-behavior-of-all-ceramic-implant-supported-and-tooth-implant-supported-fixed-dental-prostheses
#18
Abdul Rahman Alkharrat, Marc Schmitter, Stefan Rues, Peter Rammelsberg
OBJECTIVES: In vitro investigation of the effects of fixed dental prosthesis (FDP) support and loading conditions on the fracture behavior of all-ceramic, zirconia-based FDP veneered with computer-aided design/computer-aided manufacturing (CAD/CAM)-manufactured lithium disilicate ceramic. MATERIALS AND METHODS: Based on a model for a 3-unit FDP in the molar region (tooth in region 15, implant in region 17), 16 identical zirconia frameworks were fabricated and veneered with milled lithium disilicate ceramic...
December 2, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29167359/genome-diversity-in-the-neolithic-globular-amphorae-culture-and-the-spread-of-indo-european-languages
#19
Francesca Tassi, Stefania Vai, Silvia Ghirotto, Martina Lari, Alessandra Modi, Elena Pilli, Andrea Brunelli, Roberta Rosa Susca, Alicja Budnik, Damian Labuda, Federica Alberti, Carles Lalueza-Fox, David Reich, David Caramelli, Guido Barbujani
It is unclear whether Indo-European languages in Europe spread from the Pontic steppes in the late Neolithic, or from Anatolia in the Early Neolithic. Under the former hypothesis, people of the Globular Amphorae culture (GAC) would be descended from Eastern ancestors, likely representing the Yamnaya culture. However, nuclear (six individuals typed for 597 573 SNPs) and mitochondrial (11 complete sequences) DNA from the GAC appear closer to those of earlier Neolithic groups than to the DNA of all other populations related to the Pontic steppe migration...
November 29, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29134032/the-larva-of-adicella-syriaca-including-a-key-to-the-european-larvae-of-adicella-mclachlan-1877-trichoptera-leptoceridae
#20
Johann Waringer, Hans Malicky, Wolfram Graf, Simon Vitecek
Adicella syriaca is a leptocerid caddisfly distributed throughout the Balkan Peninsula, the Carpathians, the Hungarian Lowlands, the Pontic Province, and the Caucasus. This paper describes the previously unknown larva of this species, based on material from the Greek island of Corfu. Information on the morphology of the fifth larval instar is given, and the most important diagnostic features are illustrated. A key to the known larvae of the European species of Adicella McLachlan, 1877 is provided. In the context of existing identification keys, the larva of Adicella syriaca Ulmer, 1907 keys together with Adicella cremisa Malicky, 1972, but the species pair can be easily separated by the number of setae on the pro- and mesonotum, and setation patterns on abdominal dorsum IX...
2017: ZooKeys
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